Electrical - Circuit Sizing And Wire Routing; Thermostat Control And Low Voltage Control Wiring - Haier GE NS23AM Service Manual

Electrical - Circuit Sizing and Wire Routing

In the U.S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the
current Canadian Electrical Code (CEC).
Refer to the furnace or air handler installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size.
24VAC Transformer
Use the transformer provided with the furnace or air handler
for low-voltage control power (24VAC - 40 VA minimum).
Thermostat Control and Low Voltage
Control Wiring
The NS23AM variable capacity unit may be installed using
a conventional 24VAC two-stage cooling or single-stage
cooling thermostat.
NOTE:
compressor minimum on time of three minutes to prevent
compressor short cycling.
The NS23AM unit will provide full variable capacity
operation when installed with a conventional 24VAC two-
stage cooling or single-stage cooling thermostat. The
NS23AM outdoor control has advanced control algorithms
using the NS23AM suction pressure sensor to provide true
variable capacity operation.
31-5000746 Rev. 0
When utilizing a two-stage conventional 24VAC thermostat,
four wires are required to control the outdoor unit (R, C, Y1
and Y2). Refer to the NS23AM
conventional 24VAC two-stage thermostat.
When utilizing a single-stage conventional 24VAC
thermostat, three wires are required to control the outdoor
unit (R, C, and Y1) and Y1 is jumpered to Y2 in the outdoor
unit. Note that the published performance data is based
upon the use of a two-stage thermostat. Refer to the
NS23AM
single-stage thermostat.
NS23AM Low Voltage Control Wiring
Connections
The NS23AM variable capacity units are provided with (2)
RAST 6-Pin connections in the installation instruction bag
NS23AM harnesses in the low voltage control make-up
box. One RAST 6-pin connector is labeled with terminals
TST, DF, R, I+, I- and C. The second RAST 6-pin connector
is labeled with terminals DS, O, Y1, Y2, L and W.
Electrical Shock Hazard!
Can cause injury or death. Unit must be
properly grounded in accordance with
national and local codes.
Line voltage is present at all components
when unit is not in operation on units
with single-pole contactors. Disconnect
all remote electric power supplies before
opening access panel. Unit may have
multiple power supplies.
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
Take care during unit installation and service to protect
the unit's electronic controls. Precautions will help to
avoid control exposure to electrostatic discharge by
putting the unit, the control and the technician at the
same electrostatic potential. Touch hand and all tools
on an unpainted unit surface before performing any
service procedure to neutralize electrostatic charge.
Page 23
WARNING
WARNING